CN104525858A - Vacuum casting process of embedded pipe of aluminum alloy casting for home appliance mold - Google Patents
Vacuum casting process of embedded pipe of aluminum alloy casting for home appliance mold Download PDFInfo
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- CN104525858A CN104525858A CN201410779323.5A CN201410779323A CN104525858A CN 104525858 A CN104525858 A CN 104525858A CN 201410779323 A CN201410779323 A CN 201410779323A CN 104525858 A CN104525858 A CN 104525858A
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- water pipe
- sand
- temperature
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- Granted
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- 238000005266 casting Methods 0.000 title claims abstract description 37
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 26
- 239000004576 sand Substances 0.000 claims description 19
- 229910052742 iron Inorganic materials 0.000 claims description 13
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 10
- 244000035744 Hura crepitans Species 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 4
- 238000007670 refining Methods 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 2
- 238000003723 Smelting Methods 0.000 claims description 2
- 239000002390 adhesive tape Substances 0.000 claims description 2
- 238000007664 blowing Methods 0.000 claims description 2
- 239000004927 clay Substances 0.000 claims description 2
- 238000007596 consolidation process Methods 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 239000011496 polyurethane foam Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 abstract description 13
- 230000007547 defect Effects 0.000 abstract 1
- 238000007528 sand casting Methods 0.000 abstract 1
- 238000013461 design Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/03—Sand moulds or like moulds for shaped castings formed by vacuum-sealed moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
- B22C15/28—Compacting by different means acting simultaneously or successively, e.g. preliminary blowing and finally pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a vacuum casting process of an embedded pipe of an aluminum alloy casting for a home appliance mold. On the basis of a secondary molding process, combined with the new process of product characteristics of the company, the vacuum casting process aims at solving the problems that a sand casting liner mold has low yield, the working allowance of the casting is large, and the surface of the mold easily has pinholes, shrinkage porosity and various casting defects. On the basis of the vacuum casting process, the technological breakthrough of embedded water pipes is made, the process is kept while the casting quality is improved, and the purpose of saving energy is achieved. The problem that the traditional embedded pipe process is not applicable to the vacuum casting process is followed.
Description
Technical field
The present invention relates to casting technology field, be specifically related to a kind of vacuum pressing and casting electronic appliance mold aluminium alloy castings built-in pipe technique.
Background technology
Household electrical appliances die for inner is the one of vacuum plastics sucking moulding, and ABS plastic, by heating mould, is then softened plastics sucking moulding by refrigerator producer.The heating of mould is realized by the water pipe be embedded in inside aluminium alloy castings, and circulate hot water in water pipe, realizes controlling the temperature of unitary mould by control discharge and temperature.
At present, general employing Sand Moulding Process casting household electrical appliances die for inner, water pipe pre-buried, by making tube seat in advance on sand mold, then the shape of tube seat is worked it out by moulding, the copper pipe bent according to tube seat size in advance or stainless steel tube are placed in tube seat, by using the iron wire pipe clamp of U-shaped, pipeline is fixed, then block with the two ends of damp sand by pipeline, reserve interface position, pre-buried copper pipe or stainless steel tube will scribble one deck graphite, play the heat insulation effect preventing softening and prevent aluminium liquid circulation copper pipe from entering pipeline.
Summary of the invention
It is higher that technical problem to be solved by this invention is to provide a kind of mechanization degree, reduces labour intensity, the vacuum pressing and casting electronic appliance mold aluminium alloy castings built-in pipe technique of improving the quality of products.
Technical problem to be solved by this invention realizes by the following technical solutions:
A kind of vacuum pressing and casting electronic appliance mold aluminium alloy castings built-in pipe technique, comprises following processing step:
A) based on digital control processing polyurethane foam model, this model adds process parameters design according to three-dimensional modeling and processes, such as: add allowance, drafting angle, water pipe tube seat, and running gate system etc.;
B) first water pipe is bent, according to the pipeline on model, manually bend out the water pipe of all sizes, the material employing diameter of water pipe is copper pipe or the stainless steel tube of 12mm or 14mm, bending radius must not be less than 40 millimeters, bending sections must not amass and is less than full-sized 70%, and spare interface length must not be less than 80 millimeters;
C) model mould assembling and putting, according to punch moulded dimension size, selects suitable sandbox, then overlay film, model vacuumize, add sand again, jolt ramming, overlay film, sandbox vacuumize, take out model, obtain a die model, select suitable chill to be close to around model, then back-up sand consolidation, vacuumize, take out model;
D) model is when processing, is reserved with the position of tube seat, so this matrix inwall leaves the shape for lugs of tube seat, now, tube seat fixing tool is fixed on tube seat high spot; This tube seat frock is made up of two parts, one is the iron wire of fixing water pipe, in the position of tube seat through film, be responsible for being wrapped on water pipe, two is positioners, be one piece with hook square iron, serve fixing iron wire position, prevent the effect of displacement and chill, this frock is booked whole pipeline, by iron wire to insert in sand mold according to 100 ~ 150 millimeters of each distances;
E), after the inner good chill of cloth of punch and dry sand, whole sandbox puts plain bumper jolt ramming, is then vacuumized by top box, and the form film of disposable die is pasted on top box, negative pressure of vacuum cancelled by nowel, then descends box disintegration, now obtains the punch with fixing tool;
F) installation of pipeline, one deck fire clay to be coated with before water pipe is installed, then toast drying in an oven, the temperature at least more than 300 degree toasts 15 minutes, cooling after taking out, because the film that negative pressure casting uses cannot bear high temperature, be stuck on pipeline according to corresponding shape after cooling, to be then fastened water pipe by the iron wire stretched before, water pipe termination resin sand model is blocked, spare interface position, with adhesive tape fixing resin sand;
G) melting of aluminium alloy, reasonably will control temperature of aluminum liquid well during aluminium alloy smelting, remove the gred when general temperature of aluminum liquid reaches 690 DEG C, the temperature of Metamorphism treatment is at about 710 DEG C, and the temperature of blowing refining is at 730 DEG C.Skim after aluminium liquid after refining leaves standstill a period of time, because containing pipeline, temperature of aluminum liquid needs lower slightly, and cast controls at about 700 DEG C containing the last aluminium liquid pouring temperature of pipe foundry goods;
H) foundry goods is unpacked after naturally cooling and is taken out foundry goods, notes because frock and foundry goods have iron wire to be connected, and notices that taking out frock recycles.
The invention has the beneficial effects as follows:
1) have employed the mode of vacuum pressing and casting, mechanization degree is higher, reduces labour intensity.Tradition foundry casting adopts manual work, and this invention is based upon on the basis of mechanization vacuum pressing and casting, and labour intensity is low, is applicable to modernization industry Production requirement.
2) casting flaw of foundry goods is reduced, the quality of production and the qualification rate of cast product improve greatly, chill process for cooling and vacuum casting process combine by the present invention, because outer die cavity adopts the metal mold of frozen iron blocks structure, aluminium alloy is full of cast(ing) surface consecutive solidification under iron chill shock chilling effect after die cavity, cast(ing) surface setting rate is accelerated, and dendrite has little time to grow up, so what obtain is tiny, fine and close crystalline structure.
3) on the basis of vacuum casting process, achieve the research of technique of pre-buried water pipe, while raising casting quality, remain this technique, achieve energy-conservation object.
Accompanying drawing explanation
Fig. 1 is mould assembling schematic diagram of the present invention;
Fig. 2 is nowel moulding schematic diagram of the present invention;
Fig. 3 is top box moulding schematic diagram of the present invention;
Fig. 4 is water pipe positioning tool structure chart of the present invention.
1, positioning mould board; 2, vacuum sand box; 3, chill; 4, running gate system model; 5, dry sand; 6, die model; 7, punch model; 8, negative-pressure pipeline; 9, water pipe; 10, positioning tool.
Detailed description of the invention
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the present invention further.
See Fig. 1-4: a kind of vacuum pressing and casting electronic appliance mold aluminium alloy castings built-in pipe technique, comprises following processing step:
1. the threedimensional model design of inner bag product is completed based on computer aided design software CAD MBM, biasing surface order is utilized to thicken biased for machined surface according to inner bag foundry goods X-Y scheme, the allowance of fast automatic interpolation foundry goods and other necessary sized, then the die model 6 utilizing polyurethane foamed material to process to design and punch model 7, wherein leave tube seat position in advance on punch model 7.
2. Fig. 4 is that I takes charge of the water pipe positioning tool 10 of design, this frock is according to tube seat size and depth design, frock includes the iron wire part 101 of fixing water pipe, convenient through film, and the locating piece 102 of settling position, prevent frock to be subjected to displacement, in order to adapt to the technique of vacuum pressing and casting, have employed and be embedded on punch model 7, serve the effect of water pipe location and chill simultaneously.
3. Fig. 2 is display nowel moulding schematic diagram.First die model 6 is fixed on positioning mould board 1, and then the profile of die model 6 is put the chill 3 of suitable dimension, certain gap is left between chill 3, put vacuum sand box 2, while put chill 3 limit to add dry sand 5, convenient fixing chill 3 position, add sand complete after jolt ramming sandbox, then vacuumize.
4. Fig. 3 is top box moulding schematic diagram, also be feature place of the present invention, because the model of punch model 7 is comparatively complicated, direct processing spill cannot moulding, and the shaping concave shape that cannot process complexity of numerical control, so for the box casting of complexity, adopt the method for secondary moulding, directly process the punch shape of needs, then this punch vacuum moulding is utilized to go out a die model 7, then on die model 7, be well placed the running gate system 4 of design, and water pipe frock 10 is fixed on corresponding pipeline, every 100 ~ 150mm mono-, tool for placing working tools limit, limit adds sand, negative-pressure pipeline 8 is put into matrix simultaneously, to increase moulding intensity, after adding sand, be put into plain bumper jolt ramming, then extrusion forming.
5., after punch moulding completes, by the water pipe 9 that bent according to pipeline, be embedded in groove, water pipe 9 is fixed on pipeline by the iron wire part 101 then utilizing frock to stretch.
6. the model of upper nowel is sprayed, dry, then carry out mould assembling cast.Attention: should intensified negative pressure degree when cast, in order to avoid the type that collapses.When pouring into a mould, aluminium alloy solution temperature controls, at about 700 DEG C, to complete cast at the appointed time.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (2)
1. a vacuum pressing and casting electronic appliance mold aluminium alloy castings built-in pipe technique, is characterized in that, comprise following processing step:
A) based on digital control processing polyurethane foam model;
B) first bend water pipe, according to the pipeline on model, manually bend out the water pipe of required size;
C) model mould assembling and putting, according to punch moulded dimension size, selects suitable sandbox, then overlay film, model vacuumize, add sand again, jolt ramming, overlay film, sandbox vacuumize, take out model, obtain a die model, select suitable chill to be close to around model, then back-up sand consolidation, vacuumize, take out model;
D) model is when processing, is reserved with the position of tube seat, tube seat fixing tool is fixed on tube seat high spot; This frock is booked whole pipeline, by iron wire to insert in sand mold according to 100 ~ 150 millimeters of each distances;
E), after the inner good chill of cloth of punch and dry sand, whole sandbox puts plain bumper jolt ramming, is then vacuumized by top box, and the form film of disposable die is pasted on top box, negative pressure of vacuum cancelled by nowel, then descends box disintegration, now obtains the punch with fixing tool;
F) installation of pipeline, one deck fire clay to be coated with before water pipe is installed, then drying is toasted in an oven, temperature at least more than 300 degree toasts 15 minutes, and after taking out, cooling, is stuck on pipeline according to corresponding shape after cooling, then to be fastened water pipe by the iron wire stretched before, water pipe termination resin sand model is blocked, spare interface position, with adhesive tape fixing resin sand;
G) melting of aluminium alloy, temperature of aluminum liquid reasonably will be controlled well during aluminium alloy smelting, general temperature of aluminum liquid removes the gred when reaching 690 DEG C, the temperature of Metamorphism treatment is at 710 DEG C, the temperature of blowing refining is at 730 DEG C, skim after aluminium liquid after refining leaves standstill a period of time, cast controls at 700 DEG C containing the last aluminium liquid pouring temperature of pipe foundry goods;
H) foundry goods is unpacked after naturally cooling and is taken out foundry goods.
2. vacuum pressing and casting electronic appliance mold aluminium alloy castings built-in pipe technique according to claim 1, it is characterized in that: the material employing diameter of described water pipe is copper pipe or the stainless steel tube of 12mm or 14mm, bending radius must not be less than 40 millimeters, bending sections must not amass and is less than full-sized 70%, and spare interface length must not be less than 80 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410779323.5A CN104525858B (en) | 2014-12-15 | 2014-12-15 | Vacuum pressing and casting electronic appliance mold aluminium alloy castings built-in pipe technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410779323.5A CN104525858B (en) | 2014-12-15 | 2014-12-15 | Vacuum pressing and casting electronic appliance mold aluminium alloy castings built-in pipe technique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104525858A true CN104525858A (en) | 2015-04-22 |
| CN104525858B CN104525858B (en) | 2016-11-30 |
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| CN201410779323.5A Active CN104525858B (en) | 2014-12-15 | 2014-12-15 | Vacuum pressing and casting electronic appliance mold aluminium alloy castings built-in pipe technique |
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| CN (1) | CN104525858B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106890974A (en) * | 2017-03-21 | 2017-06-27 | 珠海市润星泰电器有限公司 | A kind of semisolid pressure casting mould |
| CN107052262A (en) * | 2016-12-29 | 2017-08-18 | 滁州鑫诺实业有限公司 | A kind of V method model casting techniques for casting electronic appliance mold complex class base |
| CN108655371A (en) * | 2018-06-07 | 2018-10-16 | 南京联塑科技实业有限公司 | A kind of forming module of HDPE double-wall corrugated pipes and its molding method |
| CN108858912A (en) * | 2018-06-06 | 2018-11-23 | 江苏瀚皋机械有限公司 | A kind of vacuum forming mold suction hole manufacture craft |
| CN109648063A (en) * | 2017-10-12 | 2019-04-19 | 烟台吉森新材料科技有限公司 | The fixed structure and method of water cooling tube in a kind of casting of pipe laying |
| CN109986057A (en) * | 2019-04-23 | 2019-07-09 | 南昌航空大学 | Domestic air conditioning shut-off valve made of a kind of aluminium alloy and preparation method thereof |
| CN110860656A (en) * | 2019-11-05 | 2020-03-06 | 北京遥感设备研究所 | Precise forming method for complex inner runner structure |
| CN111906270A (en) * | 2019-05-07 | 2020-11-10 | 现代自动车株式会社 | Cast product with pipe flow passage, casting method thereof and insert-cast pipe insert unit |
| CN111940677A (en) * | 2020-07-23 | 2020-11-17 | 中国第一汽车股份有限公司 | Casting method of pre-embedded die of stainless steel water-cooling pipe |
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| US20030102100A1 (en) * | 2000-03-27 | 2003-06-05 | Heiko Voigt | Method for the uphill casting of cast pieces in sand dies with controlled solidification |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107052262A (en) * | 2016-12-29 | 2017-08-18 | 滁州鑫诺实业有限公司 | A kind of V method model casting techniques for casting electronic appliance mold complex class base |
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| CN109648063A (en) * | 2017-10-12 | 2019-04-19 | 烟台吉森新材料科技有限公司 | The fixed structure and method of water cooling tube in a kind of casting of pipe laying |
| CN109648063B (en) * | 2017-10-12 | 2021-04-06 | 烟台吉森新材料科技有限公司 | Fixing structure and method for water cooling pipe in buried pipe casting |
| CN108858912A (en) * | 2018-06-06 | 2018-11-23 | 江苏瀚皋机械有限公司 | A kind of vacuum forming mold suction hole manufacture craft |
| CN108655371A (en) * | 2018-06-07 | 2018-10-16 | 南京联塑科技实业有限公司 | A kind of forming module of HDPE double-wall corrugated pipes and its molding method |
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| CN109986057B (en) * | 2019-04-23 | 2021-05-28 | 临沂大学 | Aluminum alloy made household air conditioner stop valve and manufacturing method thereof |
| CN111906270A (en) * | 2019-05-07 | 2020-11-10 | 现代自动车株式会社 | Cast product with pipe flow passage, casting method thereof and insert-cast pipe insert unit |
| CN111906270B (en) * | 2019-05-07 | 2023-11-24 | 现代自动车株式会社 | Cast product with pipe runner, casting method thereof and embedded casting type pipe embedded unit |
| CN110860656A (en) * | 2019-11-05 | 2020-03-06 | 北京遥感设备研究所 | Precise forming method for complex inner runner structure |
| CN111940677A (en) * | 2020-07-23 | 2020-11-17 | 中国第一汽车股份有限公司 | Casting method of pre-embedded die of stainless steel water-cooling pipe |
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| CN104525858B (en) | 2016-11-30 |
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Effective date of registration: 20210301 Address after: 239000, No. 401, East Xin'anjiang Road, Chuzhou City, Anhui Province Patentee after: CHUZHOU XINNUO INDUSTRIAL Co.,Ltd. Address before: No. 999, Huadong Road, Chuzhou Development Zone, Anhui Province 239000 Patentee before: CHUZHOU JINNUO INDUSTRIAL Co.,Ltd. |
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Effective date of registration: 20240506 Address after: 239000, No. 401, East Xin'anjiang Road, Chuzhou City, Anhui Province Patentee after: CHUZHOU JINNUO INDUSTRIAL Co.,Ltd. Country or region after: China Address before: 239000, No. 401, East Xin'anjiang Road, Chuzhou City, Anhui Province Patentee before: CHUZHOU XINNUO INDUSTRIAL Co.,Ltd. Country or region before: China |